body,html {
	min-width: 320px;
	min-height: 640px;
	height: 100%;
	margin: 0;
	background-color: #eee;
	display: block;
}
.mainContent {
	min-width: 320px;
	min-height: 667px;
	display: block;
}
.tips {
	height: 100px;
	padding: 20px;
	background-color: #fff;
	margin-top: 7px;
}
.tips ul {
	margin-left: 20px;
	font-size: 17px;
	font-family: PingFang-SC-Medium;
	color: #42323d;
	line-height: 29px;
}
.tips p {
	font-size: 12px;
	color: rgba(55,44,52,0.8);
	line-height: 18px;
	margin-top: 6px;
}
.singleCourse {
	width: 100%;
	height: 100px;
	display: flex;
	justify-content: flex-start;
	background-color: #fff;
	border-radius: 3px;
	margin-bottom: 7px;
}
.hasCourse {
	min-width: 320px;
	min-height: 100px;
	padding: 13px 20px;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: flex-start;
}
.singleCourse .courseIntr {
	display: flex;
	flex-direction: column;
	justify-content: flex-start;
	padding: 22px 0;
	font-size: 11px;
	color: rgba(55,44,52,0.8);
}
.inviteMethods {
	display: flex;
	flex-direction: column;
	justify-content: flex-start;
	width: 100%;
	height: auto;
}
.inviteMethods .inviteMethod {
	display: flex;
	height: 47px;
	padding-left: 15px;
	border-bottom: 1px solid #eee;
	background-color: #fff;
}
.inviteMethods .inviteMethod input {
	height: 47px;
	border: none;
	padding: 0;
	outline: none;
}
.inviteMethods .inviteMethod input::-webkit-input-placeholder {
	font-size: 17px;
	color: #b2b2b2;
}
.inviteMethods .inviteMethod input:-moz-placeholder {
	font-size: 17px;
	color: #b2b2b2;
}
.inviteMethods .inviteMethod input::-moz-placeholder {
	font-size: 17px;
	color: #b2b2b2;
}
.inviteMethods .inviteMethod input:-ms-input-placeholder {
	font-size: 17px;
	color: #b2b2b2;
}
.inviteMethods .submitBtn {
	width: 345px;
	height: 46px;
	background: url("../img/submitBtn.png") no-repeat center; 
	font-size: 18px;
	border: none;
	align-self: center;
	margin-top: 40px;
}
@media screen and (min-width: 640px) {
	.mainContent {
		max-width: 640px;
		margin: 0 auto;
	}
}